package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);//后绪步骤实现

        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
        }
    }

    @Override
    public PageResult find4Page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.find(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void delete(String ids) {
        //将各个id拆分出来
        String[] idstrlist = ids.split(",");
        List<Long> idlist = new ArrayList<>();
        for (String idstr : idstrlist) {
            idlist.add(Long.valueOf(idstr));
        }
        //for循环,1.调用dishmapper.delete,2.调用dishflavor.delete
        if (idlist != null && idlist.size() > 0) {
            idlist.forEach(id -> {
                dishMapper.delete(id);
                dishFlavorMapper.delete(id);
            });
        }
    }

    @Override
    public DishVO findById(Long id) {
        Dish dish = dishMapper.findById(id);
        List<DishFlavor> dishFlavor = dishFlavorMapper.findById(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        BeanUtils.copyProperties(dishFlavor, dishVO);
        return dishVO;
    }

    @Override
    public List<Dish> findByTypeId(Long categoryId) {
        List<Dish> dishList = dishMapper.findByTypeId(categoryId);
        return dishList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setId(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }

    @Override
    public void updateDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //更新菜品表
        dishMapper.update(dish);

        //更新口味表，先删除再插入更简单
        dishFlavorMapper.delete(dish.getId());
        for (DishFlavor dishFlavor : dishDTO.getFlavors()) {
            dishFlavor.setDishId(dish.getId());
            dishFlavorMapper.insert(dishFlavor);
        }
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.findById(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}